Valve-related standards?

What kind of standards do you need? National standard? US standard?

The standards for APIs are as follows: 1 API STD 526–1984 Safety valves with steel flanges 2 API STD 527–1991 Seat sealing performance of safety valves with metal-to-metal seats (industrial grade) 3 API STD 591–1998 User acceptance testing of refinery valves 4 API STD 593–1981 Gray iron flanged plug valves 5 API STD 594–1991 Wafer-type check valves 6 API STD 595–1979 Cast iron flanged gate valves 7 API STD 597–1981 Steel flanged and welded neck gate valves 8 API STD 598–1996 Inspection and testing of valves 9 API STD 599–1994 Steel and gray iron plug valves 10 API STD 600–2001 Steel gate valves with bolted bonnets for use in oil and gas applications 11 API STD 601–1988 Male and female pipe flanges and metal gaskets for flange connections (clad and wound types) 12 API STD 602–1993 Compact steel gate valves 13 API STD 603–1991 Cast corrosion-resistant CL150 gate valves 14 API STD 604–1981 Gray iron flanged gate valves 15 API STD 605–1988 Large-diameter carbon steel flanges (CL75–900) 16 API STD 606–1989 Extended body version of compact steel gate valves 17 API STD 607–1993 Fire resistance testing of soft seat assemblies in 1/4 turn valves 18 API STD 608–1995 Metal ball valves with flanges and weld ends 19 API STD 609–1991 Lugged wafer-type and wafer-type butterfly valves 20 API 6D–2002 Specification for pipeline valves 21 API 6FA–1994 Specification for fire resistance testing of valves 22 API 6A–2002 Specification for wellhead equipment and production tree devices 23 API QI–1994 Quality program specification

ISO standard codes for valves: ISO 4126 General requirements for safety valves ISO 5208 Pressure testing of industrial valves ISO 5209 Marking of general industrial valves ISO 5210 Pt.1 Connections for multi-turn valve actuator – Part 1: Flange dimensions ISO 5210 Pt.2 Connections for multi-turn valve actuator – Part 2: Connection performance of flanges and fittings ISO 5210 Pt.3 Connections for multi-turn valve actuator – Part 3: Dimensions of driving elements ISO 5211 Pt.1 Connections for semi-turn valve actuator – Part 1: Flange dimensions ISO 5211 Pt.2 Connections for semi-turn valve actuator – Part 2: Connection performance of flanges and fittings ISO 5211 Pt.3 Connections for semi-turn valve actuator – Part 3: Dimensions of driving elements ISO 5752 Nominal length of metal valves in flanged piping systems ISO 5996 Cast iron gate valves ISO 6002 Steel gate valves with bolted bonnets ISO 6552 Terms for automatic steam traps ISO 6553 Marking of automatic steam traps ISO 6554 Nominal length of flanged automatic steam traps ISO 6704 Classification of automatic steam traps ISO 6948 Tests on manufacturing and service characteristics of automatic steam traps ISO 7121 Fourth draft recommendation for steel ball valves with flanges and welds ISO 7259 Cast iron gate valves for underground use, operated mainly by hand ISO 7841 Steam leakage test